120 results about "Electron transfer rate" patented technology

The invention discloses a sweat uric acid and glucose sensor based on a carbon nanotube (CNT) enhanced electrochemical platform, and aims to solve the sensitivity challenge of low-concentration biomarker detection in sweat. The enzyme is covalently immobilized on the CNT through an EDC / NHS chemical method, so that the catalytic efficiency, the electron transfer speed and the sensor stability are remarkably improved, and the ultralow detection lower limit of uric acid and glucose is realized. According to the device, uric acid, glucose and pH sensing functions are integrated on a single wearable platform, efficient flowing and rapid updating of sweat are ensured through a radiation symmetry microfluid design optimized through finite element analysis, and real-time biomarker monitoring is supported. The material innovation (such as CNT-enzyme complex) and fluid dynamics optimization of the invention overcome the key problem in the field of wearable biosensing, and provide an extensible solution for the next generation of non-invasive health monitoring.

The invention discloses a ruthenium and samarium double monatomic doped three-dimensional titanium-based tin antimony nickel electrode and a preparation method and application thereof. The preparation method of the electrode comprises the following steps: (1) pretreating the titanium felt; (2) preparing a sol impregnation liquid; (3) sol coating and drying: dipping the pretreated titanium felt in the prepared sol dipping liquid, fully adsorbing and then drying to form a uniform precursor layer; and (4) roasting treatment is conducted, specifically, the dried titanium felt is placed in a muffle furnace to be roasted, and then the steps of dipping, drying and roasting are repeated till the final ruthenium and samarium double monatomic doped three-dimensional titanium-based tin-antimony-nickel electrode is obtained. In the prepared electrocatalyst, ruthenium and samarium are doped into a tin-antimony-nickel electrode in a monatomic form, the utilization efficiency of ruthenium and samarium atoms is improved, and the electrode is endowed with excellent electrocatalytic activity. The unique three-dimensional structure and double-monatomic doping significantly enhance the electron transfer rate and the reaction kinetic characteristics, so that the electrode shows excellent stability and efficient hypochlorous acid generation ability.

The invention relates to the technical field of photocatalysis, in particular to a Ni / Ga bimetal doped g-C3N4 nanotube composite material as well as a preparation method and application thereof. The Ni / Ga bimetal doped g-C3N4 nanotube composite material with the nitrogen vacancy is formed by doping Ni and Ga bimetals into the g-C3N4 nanotube and calcining the g-C3N4 nanotube in the air atmosphere to introduce the nitrogen vacancy. Nitrogen vacancies and double metal doping synergistically improve the efficiency of photocatalytic hydrogen production, because the Ni / Ga double metal doped g-C3N4 nanotube composite material with the nitrogen vacancies has a wider visible light absorption range, a lower carrier recombination rate, a higher electron transfer rate and higher stability, the composite material further has higher hydrogen production efficiency.

The invention provides a dendrobium officinale dynamic cultivation method based on Internet of Things edge calculation and mixed digital twinning, and belongs to the technical field of computer and bioengineering. The method comprises the steps of hyperspectral data acquisition, environmental parameter acquisition, construction of a 3D convolutional neural network for predicting an electron transfer rate J, construction of a hybrid digital twinborn model, fusion, environmental control and the like. According to the method for environment control, cross-climate zone experiments show that the yield can be increased by 23.6%, the polysaccharide content is increased by 18.8%, and the survival rate is increased by 15.1%; a reproducible technical framework is provided for intelligent upgrading of precision agriculture, and the application prospect is good.

The invention provides a black TiO2 nanosheet (at) Pt nanoparticle photoelectric catalyst and a preparation method and application thereof in methane photoelectric catalytic conversion, black TiO2 is prepared by introducing surface defects (such as oxygen vacancies) so as to expand the visible light response range of the black TiO2, and the surface of the black TiO2 is modified by precious metal nanoparticles (such as Pt), so that the visible light response range of the black TiO2 is expanded. While the photo-induced electron separation is promoted and the catalytic activity is improved, the overall conductivity and the interface electron transfer rate are remarkably improved. Particularly, TiO2 is constructed into an ultrathin two-dimensional nanosheet structure, so that not only can a larger specific surface area and more reaction active sites be provided, but also the diffusion path of photon-generated carriers can be shortened, and the recombination probability can be effectively reduced, thereby further enhancing the photoelectric conversion efficiency. Compared with the prior art, the catalyst provided by the invention has the advantages of ultrathin two-dimensional structure, surface defect regulation and precious metal synergistic modification, and can realize efficient visible light driven photoelectrocatalytic methane conversion.

The invention discloses a negative electrode electrolyte and an acidic tin-bromine flow battery, and belongs to the technical field of energy storage. The negative electrode electrolyte provided by the invention comprises an active substance and a supporting electrolyte, the active substance comprises tetravalent tin salt; the tetravalent tin salt is selected from at least one of tin tetrachloride, tin sulfate, tin bromide and stannate; the supporting electrolyte is selected from at least one of sulfuric acid, hydrochloric acid, perchloric acid, methanesulfonic acid, hydrobromic acid and hydriodic acid. According to the acidic tin-bromine flow battery provided by the invention, a proper tin ion ligand is selected in the negative electrode electrolyte, and the formed tin-based complex can effectively improve the redox kinetics of Sn < 4 + > / Sn < 2 + > and improve the efficiency of the tin-bromine flow battery. Besides, the modification of the negative electrode can further improve the adsorption of reactive active substances and improve the electron transfer rate, and the high specific surface area can provide more active sites, so that the reaction polarization is reduced and the battery performance is improved.

The invention provides a sewage deep denitrification method and equipment based on polysulfide-assisted activated sludge, and relates to the technical field of sewage treatment. Activated sludge is inoculated into a fluidized bed reactor to serve as a biological denitrification flora; the polysulfide agent and the nitrogen-containing wastewater to be treated respectively flow into the fluidized bed reactor from the bottom of the fluidized bed reactor through peristaltic pumps; operating the fluidized bed reactor to perform sewage denitrification, wherein the activated sludge in the fluidized bed reactor is in a fluidized state; and after water is discharged from the fluidized bed reactor, calcium salt is added for SO4 < 2-> removal control. The technical problems of limited electron transfer rate and easy generation of by-product pollution caused by taking an organic carbon source or elemental sulfur as an electron donor in the prior art are solved, and the technical effects of improving the denitrification performance, effectively controlling the generation of by-products and improving the environmental protection benefit are achieved.

The invention relates to sludge-based nano biochar as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing iron-containing excess sludge into a suspension, adjusting the pH value to 2-8, heating and hydrolyzing at 40-150 DEG C, collecting solids, drying and grinding to obtain sludge fine powder; calcining in an N2 atmosphere to obtain charcoal powder; the charcoal powder is subjected to acid pickling, and acidified charcoal is obtained; mixing and reacting with hydrogen peroxide in proportion, centrifuging to take supernate, and filtering to obtain a nano biochar solution; and purifying and drying the nano-biochar solution to prepare nano-biochar powder. The particle size of the nano biochar is 1t; the molar percentage content of the oxygen element is 15%-50%; the width of lattice fringes is 0.22 nm, and the total content of heavy metals is lower than 0.05%. The sludge-based nano biochar provided by the invention has good conductivity, oxidation-reduction property and low biotoxicity, and can simultaneously accelerate the extracellular electron transfer effect and intracellular electron transfer rate of microorganisms and improve the biological denitrification efficiency.

The invention discloses a sulfur-loaded lamellar niobium oxide / niobium nitride-biomass derived porous carbon composite electrode material as well as a preparation method and application thereof, and belongs to the technical field of preparation methods of lithium-sulfur battery electrode materials, the method comprises the following steps: dispersing biomass derived porous carbon in an ethylene glycol solution dissolved with niobium pentachloride, and sequentially performing hydrothermal reaction to obtain the sulfur-loaded lamellar niobium oxide / niobium nitride-biomass derived porous carbon composite electrode material. The preparation method comprises the following steps: firstly, preparing a porous carbon composite material, calcining the porous carbon composite material, performing calcination reaction on the porous carbon composite material and melamine at the same time, finally mixing the porous carbon composite material with elemental sulfur, and performing heat treatment to obtain the sulfur-loaded lamellar niobium oxide / niobium nitride-biomass derived porous carbon composite electrode material. Lamellar niobium oxide / niobium nitride is utilized to increase polysulfide adsorption and catalytic conversion sites, a built-in electric field generated by constructing a niobium-based heterojunction is utilized to promote the electron transfer rate in the polysulfide conversion process, the electrode reaction kinetics is accelerated, and biomass derived porous carbon is utilized to improve the matrix conductivity and inhibit the shuttle effect of polysulfide, so that the conversion efficiency of the polysulfide is improved. The cycle performance and the service life of the lithium-sulfur battery are synergistically improved.

The present application relates to a kind of trace nitrogen oxide reinforced UVB / high iodate degradation flame retardant intermediate method, comprising the following steps: respectively, an appropriate amount of high iodate and ACNHTEMPO are sequentially added into DOPO containing wastewater, the pH of mixed solution is adjusted with phosphate buffer solution, after being fully stirred, UV irradiation is carried out for a period of time, the degradation of organic phosphorus flame retardant intermediate DOPO can be realized.The present application method utilizes potassium periodate under the irradiation of ultraviolet light, activates ACNHTEMPO to speed up electron transfer rate, substantially improves the degradation efficiency of pollutant, and the pH is widely applicable.Solve the defect that most advanced oxidation technology needs to be carried out in acidic conditions;In addition, the present method is simple to operate, uses trace activator, does not produce secondary pollution, can provide new perspective for organic wastewater treatment field.

The application discloses a kind of gold nanoparticle loaded oxygen-doped ultrathin porous boron nitride film electrode and preparation method thereof, the preparation method includes the following steps: according to mass ratio 1:3-6:0.25-0.35, boric acid, urea, oxalic acid is prepared oxygen-doped ultrathin porous boron nitride, then gold nanoparticle is loaded oxygen-doped ultrathin porous boron nitride and coated on conductive substrate to form film electrode.The oxygen-doped ultrathin porous boron nitride film electrode loaded with gold nanoparticles prepared by the application has the advantages of large specific surface area, high electron-hole separation efficiency, fast electron transfer rate, etc., is a new type of film electrode with excellent photoelectric performance, meets the actual production demand, and has wide application prospect in photoelectrochemical field.The preparation method also has the advantages of simple process, easy operation, high preparation efficiency and low cost, and is suitable for large-scale preparation, which is beneficial to industrial application.

The invention belongs to the technical field of underground water pollution remediation functional catalytic materials and water treatment, and particularly relates to a modified iron heterojunction biomass slow-release material, a preparation method thereof and application of a coupled electric field in underground water organic pollutant remediation. The mushroom biochar is used as a carrier to load the modified zero-valent iron, so that the problem of iron agglomeration is effectively relieved; and the modified zero-valent iron grows in the three-dimensional pore channel of the charcoal in situ, so that the slow release of the iron active component can be realized, and the utilization efficiency of the oxidizing agent is improved. An electric field is built in the iron-carbon structure reinforcing material, so that the problem of slow mass transfer in an underground water medium is solved, and the surface accessibility of an oxidizing agent and pollutants is improved. The material not only can reduce the invalid consumption of an oxidizing agent caused by overhigh local Fe < 2 + > concentration, but also can drive directional electron migration through an electric field, realizes space-time matching and dynamic regulation and control of an electron transfer rate and an iron supply rate, forms an in-situ regeneration closed-loop system, and has a good application prospect in groundwater remediation.

The present disclosure belongs to the technical field of batteries, and provides a composite lithium iron phosphate material, and a preparation method therefor and the use thereof. The composite lithium iron phosphate material comprises a lithium iron phosphate core and a shell, wherein the shell comprises an MXene material such as Ti3C2, and a semiconductor block polymer such as P3HT-PE. The MXene material having metal properties and the semiconductor block polymer are introduced and mixed, and jointly coat lithium iron phosphate, thereby forming a Schottky junction at a position where the MXene material is in close contact with the semiconductor block polymer, such that the directional movement of electrons can be promoted and the electron transfer rate can be increased; and the block polymer has certain tensile properties, and thus can not only tightly coat the lithium iron phosphate, but also does not easily fall off during long-time charging and discharging.

The invention belongs to the technical field of microbial fuel cells, and relates to preparation of a functional lignin-based biomass charcoal electrode prepared by flash evaporation Joule heat and performance research of the functional lignin-based biomass charcoal electrode. The lignin-based biomass material is subjected to one-step carbonization and functionalization by using a flash evaporation Joule heat technology. According to the preparation method, recycling of biomass waste and preparation of the microbial fuel cell anode are rapidly and efficiently completed, and the extracellular electron transfer rate between the material and microorganisms is effectively promoted through biocompatibility and capacitive performance of the microbial fuel cell anode. The method comprises the following steps: S1, preparing and pretreating ganoderma lucidum mushroom residues; s2, carrying out hydrothermal reaction on the treated ganoderma lucidum mushroom bran, and pre-carbonizing to obtain mushroom bran water carbon; s3, mixing mushroom bran water carbon and ferrocobalt metal salt in equal proportion to obtain a flash evaporation Joule heat precursor; s4, carrying out flash Joule heat treatment on the precursor to obtain ferrocobalt doped mushroom bran graphene; s5, preparing the cobalt-iron doped graphene as an anode material and assembling the microbial fuel cell; compared with an existing microbial fuel cell anode preparation method, the method has the advantages that recycling of lignin biomass waste and preparation of the microbial fuel cell anode are rapidly and efficiently completed, and the extracellular electron transfer rate between the material and microorganisms is effectively promoted through biocompatibility and capacitive performance of the lignin biomass waste.

The invention discloses a preparation method of an MXene-based electro-polymerization molecularly imprinted polymer and application of the MXene-based electro-polymerization molecularly imprinted polymer in detection of sulfadimethoxine content. The preparation method comprises the steps of synthesis of an MXene-MOF composite material, preparation of the MXene-based electro-polymerization molecularly imprinted polymer and the like. The electrochemical detection of the SDM is realized by electrically polymerizing a layer of molecularly imprinted polymer on the surface of the MXene-based composite material. When SDM exists in a detection environment, an imprinting cavity with specific recognition capability is combined with the SDM through acting forces such as hydrogen bonds and the like, so that the electron transfer rate is hindered, and the current value is reduced. The quantitative detection of the SDM is realized by analyzing the relationship between the logarithm of the concentration of the SDM and the delta I current change value. The method has a wide concentration detection range and a low detection limit, and has a wide application prospect.

The application discloses a kind of garden plant health condition detection and early warning system based on spectral analysis, including adjustable frequency excitation light source, fluorescence detector, quadrature phase-locked demodulation module, phase frequency characteristic analysis module, early warning control unit and early warning output terminal, adjustable frequency excitation light source emits broadband sweep frequency modulation perturbation excitation light, quadrature phase-locked demodulation module executes operation filtering natural background stray light to the electric signal collected, phase frequency characteristic analysis module extracts characteristic relaxation frequency parameter when absolute phase delay parameter reaches forty-five degrees phase angle, early warning control unit sends instruction lock frequency and applies saturated light flash pulse, system calculates dynamic apparent electron transfer rate parameter, and according to temperature drift compensation baseline, executes double tolerance threshold comparison determination plant physiological stress state.The application avoids the defect of detection frequency band misplacement, eliminates the interference of strong background light and air temperature fluctuation, realizes the multi-dimensional joint early warning of early physiological stress.

The invention discloses an electrode material which is simple in preparation method, high in performance and capable of stably producing hydrogen by electrolyzing water, and also discloses a preparation method of a photocatalyst for purifying wastewater by using a derivative of the electrode material. The preparation method of the electrocatalyst mainly comprises the following steps: etching a nickel metal substrate by using diluted hydrochloric acid; the preparation method comprises the following steps: preparing a first-stage product, dissolving the first-stage product with a bismuth source and molybdate in a reaction kettle, carrying out hydrothermal synthesis to obtain a hydrothermal product, carrying out high-temperature calcination on the obtained material to obtain a sample precursor and a part of byproducts, finally repeating the reaction once to obtain a high-activity electrode and related byproduct derivatives, mixing the two byproducts, carrying out high-temperature calcination, and grinding to obtain a second-stage product. According to the prepared catalyst, a bismuth source is introduced to serve as an additive, a NiMoO4 / Fe2 (MoO4) 3 composite film layer active phase is constructed on an NF substrate through a one-step hydrothermal-corrosion-growth method, the active phase and an NF framework are induced through a confinement effect to form strong interface bonding, the electron transfer rate is increased, and the electrode performance is remarkably improved by reducing the valence band position of the active phase. The preparation process is simple to operate, the morphology of the catalyst is controllable, and derived by-products generate higher economic benefits.

The invention belongs to the field of metal ion battery material synthesis, and particularly provides a sulfur-doped oxygen-nitrogen-enriched conjugated organic material and application thereof in Li < + > / Zn < 2 + > ion batteries. The preparation method comprises the following steps: firstly, preparing 2, 3, 8, 9, 14, 15-hexachlorodiquinoline [2, 3-a: 2 ', 3'-c] phenazine (HANT-Cl) by taking cyclohexanehexone and dichlorobenzene diamine as raw materials, and then synthesizing 6S6O and the derivative thereof by taking HATN-Cl, sodium sulfide nonahydrate and a naphthoquinone derivative as raw materials. The obtained electrode material contains a plurality of oxidation-reduction active sites, multi-electron storage can be carried out, the transfer rate of electrons is improved through the large pi conjugated structure of the conjugated quinoneazine material, and therefore the high theoretical specific capacity and the excellent rate performance are achieved. Due to the addition of the sulfur element, the oxidation-reduction potential of the material is improved, the energy density of a battery can be improved, and the material has a wide application prospect in a Li < + > / Zn < 2 + > ion battery system.

The present invention relates to the technical field of electrocatalytic materials, and in particular to an OER electrocatalyst and a preparation method thereof, the preparation method comprising: adding an iron salt, a nickel salt, a nitrogen source and a foam nickel substrate to water to obtain a mixed solution; reacting the mixed solution under preset temperature conditions to obtain a precursor; and sulfurizing the precursor to obtain the OER electrocatalyst. In the present invention, the precursor with a nanoflower morphology formed in the hydrothermal process still retains the morphological characteristics of the nanoflowers in the high-temperature sulfurization process, which allows enough active sites to be fully exposed. The heterogeneous interface (Fe3S4 / Ni(OH)2) in the electrocatalyst has a synergistic effect, which improves the charge distribution on the catalyst surface, accelerates the electron transfer rate, and effectively improves the OER catalytic activity. In the stability test under high current density, the Fe3S4 / Ni(OH)2 / NF catalyst also showed excellent long-term stability. At a current density of 100mA cm ‑2 It can work stably for 100 hours.

This invention discloses a molecularly imprinted modified electrode for detecting trifluoroacetic acid in water, its preparation method, and its application. An integrated composite sensing interface is constructed, comprising an enrichment layer, a recognition layer, and a conductive layer, wherein a monolayer Ti3C2T is used. x A three-dimensional conductive network is constructed as the conductive layer, significantly enhancing the electron transfer rate. A molecularly imprinted polymer is used as the conversion layer; its pre-designed specific recognition cavity accurately captures target molecules and converts the specific binding behavior of trifluoroacetic acid into a detectable electrochemical signal. UiO-66-F4 is used as the enrichment layer; leveraging the fluoride-loving interactions between fluorine atoms, trifluoroacetic acid molecules in the water sample are efficiently enriched at the electrode interface, significantly reducing the detection limit to as low as 6.94 ng / L. This molecularly imprinted modified electrode exhibits good selectivity and anti-interference capabilities, along with good repeatability, reducing the detection cost per sample and enabling sensitive and rapid detection of trifluoroacetic acid under complex water conditions.

The invention discloses an enzyme biosensor for rapid detection of organophosphorus pesticide dimethoate as well as preparation and application of the enzyme biosensor, and relates to the field of electrochemical sensors. The method comprises the following steps: preparing GR / GCE, preparing AuNPs / GR / GCE, and preparing AChE / AuNPs / GR / GCE. Graphene and gold nanoparticles are compounded to form AuNPs / GR / GCE, the electrochemical impedance of the glassy carbon electrode is remarkably reduced, the effective specific surface area of the glassy carbon electrode is increased, the electron transfer rate of the surface of the glassy carbon electrode is increased, rich binding sites are provided for immobilization of enzyme molecules, the stability of enzyme is improved, and degradation or inactivation of the enzyme in the using process is reduced; acetylcholine esterase is used as a recognition probe, AChE / AuNPs / GR / GCE is constructed on AuNPs / GR / GCE in a self-assembly mode, dimethoate can prevent acetyl thiocholine iodide from being hydrolyzed to generate thiocholine, electrochemical response signals are reduced, and the dimethoate has good electrochemical response signals, so that the organophosphorus pesticide dimethoate residue is rapidly, accurately and safely screened on site.

The invention provides a silk-screen printing carbon electrode plate and a preparation method thereof, and relates to the technical field of electronic printing. The preparation method of the silk-screen printing carbon electrode plate comprises the following steps: etching at least one micron-sized groove in a working electrode surface area of a carbon electrode plate base material by adopting laser; carrying out plasma activation treatment on the surface with the groove so as to introduce an active functional group while increasing the specific surface area; and then coating the surface of the treated base material with carbon paste through a screen printing technology with optimized parameters to obtain the screen-printed carbon electrode plate. According to the invention, through synergistic modification of the physical morphology and chemical properties of the substrate, the adhesiveness of the carbon paste and the electrochemical active area of the electrode are improved fundamentally, and the electron transfer rate, the reaction sensitivity and the stability of the screen-printed carbon electrode plate are significantly enhanced.

This invention relates to the preparation of a metal-organic framework (MOF) material with confined trimetallic active centers and its catalytic performance in the artificial photosynthesis of urea. A trimetallic synergistic catalytic MOF is provided to address the problem of MOFs' difficulty in photocatalytic urea production. Methods: 1. Preparation of NH2-MIL-125(Ti / Ce); 2. Preparation of Cu-NH2-MIL-125(Ti / Ce). This invention first dopes cerium into NH2-MIL-125(Ti), and then coordinates the amino group of NH2-MIL-125(Ti / Ce) with copper, thereby increasing the electron transfer rate during the photocatalytic process and achieving a high photocatalytic urea yield for Cu-NH2-MIL-125(Ti / Ce). In this invention, the photocatalytic urea yield of Cu-NH2-MIL-125(Ti / Ce) is 400 μg gcat. ‑1 .

The invention provides a photoelectrochemical aptamer sensor for detecting alpha fetoprotein and a preparation method of the photoelectrochemical aptamer sensor, and relates to the technical field of sensors. According to the invention, a solvothermal method and a chemical reduction method are combined to gradually load BiPO4 nanosheets and Ag NPs onto TiO2NRA, so that the Ag / BiPO4 / TiO2NRA ternary composite material is obtained. Through the synergistic effect of a Type II type n-n heterojunction formed by TiO2NRA and BiPO4 and the surface plasma resonance (SPR) effect of Ag, the utilization rate of a photoelectric material to visible light is increased, and the photoelectric property of the photoelectric material is improved, so that the sensitivity of a photoelectrochemical biosensor is improved, and the detection range of alpha fetoprotein to be detected is expanded. In addition, a Type II type n-n heterojunction constructed by BiPO4 and TiO2NRA improves the transfer rate of electrons, the SPR effect of metal Ag is combined with the Type II type n-n heterojunction structure, a visible light source is utilized to a great extent, the photoelectric property of the photoelectrochemical aptamer sensor is improved, the sensitivity of the alpha fetoprotein photoelectrochemical aptamer sensor is further improved, and the detection limit is lower.

The application discloses an amperometric current density stable MoS2 / Ni3S4 / CFP electrocatalyst and a preparation method and application thereof, and belongs to the technical field of electrocatalytic hydrogen evolution. The application constructs a heterojunction interface between MoS2 and Ni3S4 through a hydrothermal reaction, and MoS2 and Ni3S4 generate a heterojunction on a carbon paper substrate to obtain the amperometric current density stable MoS2 / Ni3S4 / CFP electrocatalyst. The preparation of the composite material comprises the following steps: (1) dissolving nickel salt, urea and ammonium fluoride in water, stirring, and then placing the obtained mixed solution A and carbon paper in a hydrothermal reaction kettle for one-time hydrothermal reaction to obtain a nickel hydroxide precursor; (2) dissolving molybdenum salt and thiourea in water, stirring, and then placing the obtained mixed solution B and the nickel hydroxide precursor in the hydrothermal reaction kettle for two-time hydrothermal reaction to obtain the catalyst. The catalyst improves the electron transfer rate, increases the number of active sites, and exhibits excellent hydrogen evolution reaction activity and stability in the water electrolysis process.

The invention belongs to the technical field of electrochemical detection, and particularly provides a sensor for evaluating oxidation resistance and a preparation method thereof, and the sensor adopts an AuNPs / PtNPs / CFME electrode formed by modifying a carbon fiber microelectrode through electro-deposition of AuNPs and PtNPs as a working electrode. The invention further provides an anti-oxidation capability evaluation method based on the sensor. According to the sensor provided by the invention, the specific surface area is obviously increased, the surface activity of the electrode is enhanced, the contact opportunity between the electrode and a substance in a solution is improved, and the electron transfer rate is favorably improved. The sensor is used for evaluating the oxidation resistance, the stability and the anti-interference performance are excellent, the electrochemical response sensitivity is relatively high, high-sensitivity quantitative detection of guanine can be realized, and the total oxidation resistance evaluation of ascorbic acid (AA) and anchusa in different producing areas is successfully realized by adopting the constructed method; and a new view angle and a new method are provided for evaluating the oxidation resistance of the plant.

The application provides a tin-gallium co-doped copper oxide-based catalyst and a preparation method and application thereof, and belongs to the technical field of electrocatalytic reduction of carbon dioxide. First, copper salt, tin salt and gallium salt are dispersed in water, an alkali solution is added dropwise, and then standing is performed to obtain a mixture; then the mixture is sequentially subjected to a hydrothermal reaction, centrifugal separation and drying to obtain the tin-gallium co-doped copper oxide-based catalyst. The tin-gallium co-doped copper oxide-based catalyst prepared by the application has more stable reaction active sites, faster electron transfer rate, more stable performance and higher electrocatalytic carbon dioxide conversion efficiency compared with other copper oxide-based catalysts of the same type.

The application discloses a kind of solubility carbon black electron transfer capacity quantitative prediction method, more than three temperature is selected and is prepared carbon black using biomass, is configured into mixed solution by adding water, mixed solution is cultured by shaker, solution is centrifuged, supernatant is filtered, and solubility carbon black solution is obtained;The concentration of solubility carbon black solution is determined, and the cyclic voltammetry curve of carbon black solution is determined using electrochemical workstation and three electrode system, the peak potential corresponding to each scanning speed in the curve, peak current are obtained, according to scanning rate, peak potential, peak current, solubility carbon black solution concentration, electron transfer rate constant k 0 It is calculated by using Bulter-Volmer equation, linear prediction model is constructed by the logarithmic value of electron transfer rate constant k 0 And pyrolysis temperature, the electron transfer capacity of carbon black at different temperatures is predicted using the model;The method is simple and easy to operate, and the electron transfer capacity of solubility carbon black of known raw material type can be directly predicted.

The invention belongs to the technical field of heavy metal wastewater treatment, and particularly discloses application of a polydopamine modified nano zero-valent iron composite material and dissimilatory iron reducing bacteria in removal of Cr (VI) in wastewater. According to the method, the PDA-nZVI composite material is prepared by using polydopamine modified nano zero-valent iron through a one-pot method, the PDA-nZVI composite material and dissimilatory iron-reducing bacteria form a synergistic system to remove Cr (VI) in wastewater, and through PDA mediation, the problem of agglomeration of nZVI can be solved, the external transmission rate of internal iron core electrons of nZVI is remarkably increased, and the Cr (VI) in the wastewater can be removed. And the electron transfer rate between the dissimilatory iron reducing bacteria and iron oxide in the nZVI surface passivation layer can be improved, the dissolution of the nZVI surface passivation layer is accelerated, and the problem of nZVI surface passivation is effectively solved. The technology for solving nZVI surface passivation provided by the invention has the advantages of high efficiency, low cost, environmental friendliness and the like.

The utility model discloses an auxiliary jig for anodic oxidation of a semiconductor etching cavity Liner, which belongs to the technical field of semiconductors, and comprises an object to be plated and a first support assembly for supporting the object to be plated, and further comprises an auxiliary assembly for improving the electron transfer rate; the second supporting assembly is used for supporting the auxiliary assembly; the pipeline is used for stirring the solution in the to-be-plated object; the auxiliary assembly comprises a first barrel, a cross-shaped supporting frame, a rod body and a through hole, the cross-shaped supporting frame is fixedly connected to the upper end of the first barrel, the rod body is installed on the first barrel, the rod body is installed on the second supporting assembly, the first barrel is located in an object to be plated, and the second barrel is located in the second supporting assembly. A through hole for enabling the first barrel to be communicated with an object to be plated is formed in the first barrel; according to the utility model, under the action of air stirring and the auxiliary cathode, electrons can be promoted to rapidly transfer and fully react, so that the film thickness and the film quality are the same as those of the outer surface of the cavity.